Annelida of the Bermudas. 623 



to the breadth of the body, with well-defined annuli, those on the 

 distal portion being rather longer than broad. Farther back the 

 cirri gradually become shorter and more slender, but unequally so, 

 longer and shorter ones often alternating, the longer ones scarcely 

 equal to f the breadth of the body, composed of about 12 annuli, 

 the shorter about half as long. Back of the gastric region the cirri 

 become shorter and more nearly alike, equal to about ^ to :^ the 

 breadth of the adjacent segments, composed of 6 to 8 annuli, 

 tapered, and subacute. The ventral cirri are ovate, nearly as long as 

 the setigerous lobes. The parapodia are large and the segments are 

 rounded and separated by well marked constrictions. 



The setae are few ; in the anterior fascicles there are usually 4 or 

 5, all compound, with slender stems ; the upper ones have slender 

 lanceolate blades, 4-6 times as long as wide ; the lower ones have 

 shorter blades, 2-2\ times as long as wide; the tips are incurved 

 and most of them are very minutely bidentate. One or two slender 

 subacute acicula are usually present, but they rarely project beyond 

 the ends of the parapodia. Posterior to the stomach the setje are 

 reduced to 2 or 3 long compound ones, with very short blades ; from 

 segments 20-22 they are replaced by 1 or 2 simple bidentate setae or 

 crotchets, but compound setae may have existed on the lost caudal 

 segments ; the posterior setae are much longer than the anterior, with 

 a much stouter stem, terminating in a bifid or two-pronged tip, evi- 

 dently due to the consolidation of a short blade with the stem. 

 There are usually two stout acicula, one with a blunt tip and the 

 other hooked. 



The oesophagus is very long and slender, occupying about 12 seg- 

 ments ; it has a bulbous swelling a little back of the anterior end ; 

 the margin is a little emarginate, with the dorsal side longer ; the 

 edge is finely denticulated ; the tooth is large and elongated, acumi- 

 nate, with a sharp tip which projects beyond the edge. The stomach 

 is nearly opaque, whitish, rather long and thick, occupying 6 seg- 

 ments. It is covei'ed with about 38 rows of distinct rounded groups, 

 separated by definite narrow lines of green cells, which unite in 

 the median line to form a row of angular groups. 



The color in formalin is pale green with a darker green line aci'oss 

 the middle of each anterior segment, above; stomach opaque, whitish. 



Length of the type, without caudal segments, 15'""'; diameter, .6'^^. 



Eusyllis (Synsyllis) longigularis, sp. nov. 



Body long and slender with short dorsal cirri, and a long slender 

 oesophagus, minutely denticulate at the margin. Head small, rather 



